Institutio Oratoria

Quintilian

Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.

We must also ensure that it is free alike from omissions and from redundance. Redundance as a rule occurs through our dividing into species when it would be sufficient to divide into genera, or through the addition of species after stating the genus. The following will serve as an example:

I will speak of virtue, justice and abstinence.

But justice and abstinence are species of tile genus virtue.